package file;

import java.io.File;

public class ListFilesDemo {
    public static void main(String[] args) {
        File dir=new File(".");
        if(dir.isDirectory()){
            File []subs=dir.listFiles();
            System.out.println("子项个数"+subs.length);
            for(File sub:subs)
                System.out.println(sub.getName());
        }
    }
}
